Application of Biogas in Power Generation System

摘要

The use of sludge from wastewater treatment operations to generate energy is common throughout the world. Biogas from wastewater treatment plants by anaerobic digestion has been successfully used to provide both heat and electricity. Anaerobic sludge digestion is the biochemical oxidation of complex organic substances in the absence of free oxygen. During anaerobic digestion, energy is released and much of the volatile organic matter is converted to methane, carbon dioxide and water. Biogas is saturated and contained H2S and the simplest use is in a boiler to produce hot water or steam. Processing organic waste anaerobically to create biogas is a renewable waste to energy solution. When biogas burned, a cubic foot of biogas yields about 10 Btu of heat energy per percentage of methane composition. As a case study in this paper biogas production in MASHHAD wastewater treatment plant is considered. Biogas production of MASHHAD wastewater treatment is about 7500 cubic meter per day and consists of approximately 60-70 percent methane and 30-40 percent carbon dioxide but is also contains some hydrogen sulfide and other gases. In order to establish the biogas power plant in this city, the usable pollutants in MASHHAD were studied and they were divided into several groups. Biogas is produced by anaerobic digestion and energy production from biogas in this power generation is more than 2 MW. Kpower generation;;biogas;;anaerobic digestion;;wastewater;;renewable source